//mixin：混入（函数）
clearDefault()
    border: none
    outline: none
    appearance: none

btn(color, border = false)
    text-decoration: none
    border-radius: 5px
    outline: none
    border: none
    padding: 5px 10px
    cursor: pointer
    if(border == false)
        background-color: color
        color: #fff
    else
        border:1px solid color
        color: $font
primaryBtn()
    btn($skyblue)

primaryBorderBtn()
    btn($skyblue,true)

infoBtn()
    btn($skyblue)